3.2.2 Chronic paroxysmal hemicrania

Description:
Attacks of paroxysmal hemicrania occurring for more than one year without remission, or with remission periods lasting less than one month.

Diagnostic criteria:
A. Attacks fulfilling criteria for 3.2 Paroxysmal hemicrania, and criterion B below
B. Occurring without a remission period, or with remissions lasting <1 month, for at least 1 year.

Comment:
Patients who fulfil criteria for both 3.2.2 Chronic paroxysmal hemicrania and 13.1 Trigeminal neuralgia (sometimes referred to as CPH-tic syndrome) should receive both diagnoses. Their recognition is important, since both disorders require treatment. The pathophysiological significance of the association is not yet clear.